2 files changed, 3 insertions, 1 deletions

diff --git a/include/linux/pci.h b/include/linux/pci.h
index d8c379dba6ad..89b46fd245c6 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -324,6 +324,7 @@ struct pci_dev {
         unsigned int    is_hotplug_bridge:1;
         unsigned int    __aer_firmware_first_valid:1;
         unsigned int    __aer_firmware_first:1;
+        unsigned int    io_window_1k:1; /* Intel P2P bridge 1K I/O windows */
         pci_dev_flags_t dev_flags;
         atomic_t        enable_cnt;     /* pci_enable_device has been called */
 
diff --git a/include/linux/pci_regs.h b/include/linux/pci_regs.h
index 4b608f543412..88c9ea56e252 100644
--- a/include/linux/pci_regs.h
+++ b/include/linux/pci_regs.h
@@ -125,7 +125,8 @@
 #define  PCI_IO_RANGE_TYPE_MASK 0x0fUL  /* I/O bridging type */
 #define  PCI_IO_RANGE_TYPE_16   0x00
 #define  PCI_IO_RANGE_TYPE_32   0x01
-#define  PCI_IO_RANGE_MASK      (~0x0fUL)
+#define  PCI_IO_RANGE_MASK      (~0x0fUL) /* Standard 4K I/O windows */
+#define  PCI_IO_1K_RANGE_MASK   (~0x03UL) /* Intel 1K I/O windows */
 #define PCI_SEC_STATUS          0x1e    /* Secondary status register, only bit 14 used */
 #define PCI_MEMORY_BASE         0x20    /* Memory range behind */
 #define PCI_MEMORY_LIMIT        0x22